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QUEST
335
Digital controls
Long-life impeller
230V & 277V units
Industry-leading efficiency
Superior MERV-13 air filtration
Filter Compensation Technology
Auto-restart after power outages
Q U E S T C L I M A T E . C O M / ( 8 7 7 ) 4 2 0 - 1 3 3 0
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
Serial Number
Install Date
Sold By
Patents: thermastor.com/patents
T S - 1 1 9 6
0 5 / 2 2 R E V A
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Table of Contents
Related Manuals for Quest Engineering 335
Summary of Contents for Quest Engineering 335
- Page 1 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS QUEST Digital controls Serial Number Long-life impeller Install Date 230V & 277V units Sold By Industry-leading efficiency Superior MERV-13 air filtration Filter Compensation Technology Auto-restart after power outages Patents: thermastor.com/patents Q U E S T C L I M A T E . C O M / ( 8 7 7 ) 4 2 0 - 1 3 3 0 T S - 1 1 9 6 0 5 / 2 2 R E V A...
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Page 2: Table Of Contents
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS TABLE OF CONTENTS Safety Precautions ............3 7.7 Remote Controls ..........19 1. Intended Application ............4 7.7A Humidity Control ........17 7.8 Defrost Thermostat ..........19 2. Registrations ..............4 7.9 Condensate Pump Kit ......... 19 3. -
Page 3: Safety Precautions
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS SAFETY PRECAUTIONS Read the installation, operation and maintenance instructions carefully before installing and operating this device. Proper adherence to these instructions is essential to obtain maximum benefit from your Quest Dehumidifier. READ AND SAVE THESE INSTRUCTIONS •... -
Page 4: Intended Application
In order to efficiently control humidity levels, the area in which the dehumidifier is to be operated must be free of water intrusion or excessive fresh (outside) air infiltration. Before installing the Quest 335 Dehumidifier, water intrusion and air infiltration problems should be addressed or noted in calculations. -
Page 5: Installation
INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS 4. INSTALLATION 4.1 LOCATION The Quest 335 Dehumidifier can be installed in a variety of locations to meet the owner’s needs as listed below. In all cases keep the following cautions in mind: •... -
Page 6: Condensate Water Removal
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS CAUTION! For proper drainage, the unit must be mounted so the drain outlet is at least 6.75” above the floor drain, and must be fully supported under the base. 4.3 CONDENSATE WATER REMOVAL Condensate drains by gravity via the drain port. -
Page 7: Hanging Diagram
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS 4.3 HANGING DIAGRAM QUEST 335 16.6 22.2 3/8” threaded rod Treated Air 3/8” Jam Nuts Intake Air Parts Needed: 4 pieces 3/8” threaded rod (not included) Threaded rods should be engaged 4 - 3/8” threaded jam nuts (not included) no less than 2”... -
Page 8: Hard-Wiring Instructions
INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS 4.5 HARD-WIRING INSTRUCTIONS WARNING! Servicing the Quest 335 Dehumidifier, with its high pressure refrigerant system and high voltage circuitry presents a health hazard which could result in death, serious bodily injury, and/or property damage. Only qualified service people should service this unit. - Page 9 QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS Wire harness Disconnect black wire power cord black wire Wire harness white wire Disconnect power cord white wire Disconnect power cord green wire from ground stud Disconnect POWER CORD BLACK wire from terminal Disconnect POWER CORD WHITE wire from terminal.
- Page 10 QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS Hardwire kit with jumper wires can be found in the pack part kit. Connect BLACK and WHITE jumper wires to terminal block as shown. Place GREEN jumper wire ring terminal on ground stud and use 11/32” driver to secure nut to stud.
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Page 11: Supply & Return Duct Kit
INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS Replace access panel using T25 Torx driver to secure 7 screws. 4.6 QUEST 335 SUPPLY AND RETURN DUCT KIT (P/N 4042685) If factory duct kit accessory was purchased, follow instructions included with duct kit. -
Page 12: Control Options
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS 5. CONTROL OPTIONS The Quest 335 Dehumidifier can be controlled by its on board dehumidistat or with an external control using its low voltage terminal block. 5.1A QUEST 335 ON BOARD DEHUMIDISTAT... -
Page 13: B External Control Options
This must be activated when an external control is used to control RH. When Terminal Control is active, the internal RH sensor is disabled. 5.1B QUEST 335 EXTERNAL CONTROL OPTIONS Quest offers three external control options: Quest DEH 3000R, Honeywell Remote Analog Humidistat, and Honeywell Humidipro. -
Page 14: External Control
To access the air filter, remove the filter access panel from the end of the Quest 335 Dehumidifier. The filter should be readily visible and can be removed by pulling it straight out of the Quest 335 Dehumidifier. -
Page 15: Service
7.2 TECHNICAL DESCRIPTION The Quest 335 Dehumidifier uses a refrigeration system similar to an air conditioner’s to remove heat and moisture from incoming air, and add heat to the air that is discharged. Hot, high-pressure refrigerant gas is routed from the compressor to the condenser coil. The refrigerant is cooled and condensed by giving up its heat to the air that is about to be discharged from the unit. - Page 16 QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS Compressor is not running. Dehumidification is being called for. No fan call. Defective compressor run capacitor. 2. Loose connection in compressor circuit. 3. High pressure switch open or unplugged. 4. Defective compressor.
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Page 17: Refrigerant Charging
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS Filter Change Light illuminated (too frequently): Change filter if dirty. 2. Hold filter change button to reset filter life hours. 3. Ducting configuration causing poor airflow. Disable filter change light by selecting a different fan speed. -
Page 18: B External Control Options
7.7 REMOTE CONTROLS The Quest 335 Dehumidifier is controlled by devices mounted on a panel that is remote from the unit. You may or may not have the devices listed below depending on the model of the remote hygrostat you purchased. -
Page 19: A Humidity Control
The humidity control is an adjustable switch that closes when the relative humidity of the air in which it is located rises to the set point. It opens when the RH drops 4 to 6% below the set point. If the Quest 335 Dehumidifier does not run, try turning the humidity control Down using arrow on control pad. -
Page 20: Error Codes
A warranty certificate has been enclosed with this unit; read it before any repair is initiated. If a warranty repair is required, call the factory first at 1-877-420-1330 for warranty claim authorization and technical assistance. 8. QUEST 335 ERROR CODES # NAME MACHINE DISPLAY... -
Page 21: Wiring Diagram
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS WIRING DIAGRAM OF THE QUEST 335 DEHUMIDIFIER (877) 420-1330 QUESTCLIMATE.COM... -
Page 22: Service Parts List
QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS SERVICE PARTS LIST FOR QUEST 335 Item Part No Qty Description Item Part No Qty Description 4041909 UI Control Board 4042467 Relay 4042009 Cover, UI, 24VAC 4042818 Relay (277v) 4042061 Sensor, Temp & RH, Digital... - Page 23 QUEST 335 INSTALL ATION, OPERATION AND MAINTENANCE INSTRUCTIONS (877) 420-1330 QUESTCLIMATE.COM...
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Page 24: Warranty
(but all warranty periods will be extended by the period of time, if any, that the Quest 335 Dehumidifier is out of service while awaiting covered warranty service).
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